2025-26 Topps Sonic Boom Cooper Flagg #SB-18
$119.36est. value (ungraded)
Prices updated 2026-10-16
Based on recorded sold prices how we price cards
Cooper Flagg price history
PSA 10 market value, one reading a day. One-day spikes that reverse the next day are left out.
Recent recorded prices
7 recorded price points for the 2025-26 Topps Sonic Boom Cooper Flagg #SB-18 from our sales and market data.
| Date | Source | Price |
|---|---|---|
| Oct 16, 2026 | Market value | $119.36 |
| Oct 16, 2026 | Market value | $119.36 |
| Oct 15, 2026 | Market value | $119.36 |
| Oct 7, 2026 | Market value | $118.65 |
| Oct 7, 2026 | Market value | $118.65 |
| Aug 17, 2026 | Ebay Market | $227.50 |
| Aug 16, 2026 | Market value | $147.88 |
Cooper Flagg prices by grade
| Grade | Value | eBay |
|---|---|---|
| Ungraded | $119.36 | Buy on eBay ↗ |
| PSA 8 | $132.50 | Buy on eBay ↗ |
| PSA 9 | $240.80 | Buy on eBay ↗ |
| Grade 9.5 | $405.38 | Buy on eBay ↗ |
| PSA 10 | $1,150.00 | Buy on eBay ↗ |
| BGS 10 | $1,495.00 | Buy on eBay ↗ |
| CGC 10 | $690.00 | Buy on eBay ↗ |
| SGC 10 | $690.00 | Buy on eBay ↗ |
Live on eBay
Affiliate — we may earn a commission2025-26 Topps Sonic Boom Cooper Flagg #SB-18 value & prices
The 2025-26 Topps Sonic Boom Cooper Flagg #SB-18 is a Basketball card. Ungraded copies carry a market value of about $119.36.
An ungraded copy is worth around $119.36, a PSA 9 around $240.80, a PSA 10 (Gem Mint) around $1,150.00, a pristine BGS 10 around $1 and495.00. That's roughly a 9.6× premium for a gem-mint copy over raw — one of the clearest signals that condition-sensitive buyers dominate this card's market.
Is it worth grading?
With raw copies near $119.36 and top grades reaching $1,150.00, grading a sharp copy of this card can clearly pay for itself — the spread comfortably covers a typical ~$25.00 grading fee. The catch: only submit copies with strong centering, clean corners, and unmarked surfaces, because anything below a 9 usually erases the math.
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